Meaning of backdate

back•date

Pronunciation: (bak'dāt"), [key]
— -dat•ed, -dat•ing.
  1. to date earlier than the actual date; predate; antedate: Backdate the letter so he'll think I wrote it last week.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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